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eden/src/input_common/drivers/sdl_driver.cpp
lizzie ac17c11f6d FX
2026-05-20 15:03:21 +00:00

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// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
// SPDX-FileCopyrightText: 2018 Citra Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "common/logging.h"
#include "common/math_util.h"
#include "common/param_package.h"
#include "common/settings.h"
#include "common/thread.h"
#include "common/vector_math.h"
#include "input_common/drivers/sdl_driver.h"
namespace InputCommon {
namespace {
Common::UUID GetGUID(SDL_Joystick* joystick) {
const SDL_GUID guid = SDL_GetJoystickGUID(joystick);
std::array<u8, 16> data{};
std::memcpy(data.data(), guid.data, sizeof(data));
// Clear controller name crc
std::memset(data.data() + 2, 0, sizeof(u16));
return Common::UUID{data};
}
using GamepadBindings = std::vector<SDL_GamepadBinding>;
SDL_GamepadBinding EmptyBinding() {
SDL_GamepadBinding binding{};
binding.input_type = SDL_GAMEPAD_BINDTYPE_NONE;
return binding;
}
GamepadBindings GetBindings(SDL_Gamepad* controller) {
if (controller == nullptr) {
return {};
}
int binding_count = 0;
SDL_GamepadBinding** bindings = SDL_GetGamepadBindings(controller, &binding_count);
if (bindings == nullptr) {
return {};
}
GamepadBindings cached_bindings{};
cached_bindings.reserve(static_cast<std::size_t>(binding_count));
for (int i = 0; i < binding_count; ++i) {
if (const auto* current = bindings[i]) {
cached_bindings.emplace_back(*current);
}
}
SDL_free(bindings);
return cached_bindings;
}
template <typename Predicate>
SDL_GamepadBinding FindBinding(const GamepadBindings& bindings, Predicate matches) {
const auto it = std::find_if(bindings.begin(), bindings.end(), matches);
return it != bindings.end() ? *it : EmptyBinding();
}
SDL_GamepadBinding GetBindingForButton(const GamepadBindings& bindings, SDL_GamepadButton button) {
return FindBinding(bindings, [button](const SDL_GamepadBinding& current) {
return current.output_type == SDL_GAMEPAD_BINDTYPE_BUTTON &&
current.output.button == static_cast<SDL_GamepadButton>(button);
});
}
SDL_GamepadBinding GetBindingForAxis(const GamepadBindings& bindings, SDL_GamepadAxis axis) {
return FindBinding(bindings, [axis](const SDL_GamepadBinding& current) {
return current.output_type == SDL_GAMEPAD_BINDTYPE_AXIS &&
current.output.axis.axis == static_cast<SDL_GamepadAxis>(axis);
});
}
} // Anonymous namespace
static bool SDLEventWatcher(void* user_data, SDL_Event* event) {
auto* const sdl_state = static_cast<SDLDriver*>(user_data);
sdl_state->HandleGameControllerEvent(*event);
return true;
}
class SDLJoystick {
public:
SDLJoystick(Common::UUID guid_, int port_, SDL_Joystick* joystick,
SDL_Gamepad* game_controller)
: guid{guid_}, port{port_}, sdl_joystick{joystick, &SDL_CloseJoystick},
sdl_controller{game_controller, &SDL_CloseGamepad} {
EnableMotion();
}
void EnableMotion() {
if (!sdl_controller) {
return;
}
SDL_Gamepad* controller = sdl_controller.get();
if (HasMotion()) {
SDL_SetGamepadSensorEnabled(controller, SDL_SENSOR_ACCEL, false);
SDL_SetGamepadSensorEnabled(controller, SDL_SENSOR_GYRO, false);
}
has_accel = SDL_GamepadHasSensor(controller, SDL_SENSOR_ACCEL);
has_gyro = SDL_GamepadHasSensor(controller, SDL_SENSOR_GYRO);
if (has_accel) {
if (!SDL_SetGamepadSensorEnabled(controller, SDL_SENSOR_ACCEL, true)) {
LOG_WARNING(Input, "Failed to enable accelerometer sensor: {}", SDL_GetError());
}
}
if (has_gyro) {
if (!SDL_SetGamepadSensorEnabled(controller, SDL_SENSOR_GYRO, true)) {
LOG_WARNING(Input, "Failed to enable gyroscope sensor: {}", SDL_GetError());
}
}
LOG_INFO(Input, "Controller motion capabilities: accel={} gyro={}", has_accel, has_gyro);
}
bool HasMotion() const {
return has_gyro || has_accel;
}
bool UpdateMotion(SDL_GamepadSensorEvent event) {
constexpr float gravity_constant = 9.80665f;
std::scoped_lock lock{mutex};
const u64 sensor_timestamp = event.sensor_timestamp != 0 ? event.sensor_timestamp
: event.timestamp;
if (last_motion_update == 0) {
last_motion_update = sensor_timestamp;
return false;
}
if (sensor_timestamp < last_motion_update) {
return false;
}
// SDL3 reports sensor timestamps in nanoseconds, while the input stack expects
// delta timestamps in microseconds.
const u64 time_difference = (sensor_timestamp - last_motion_update) / 1000;
last_motion_update = sensor_timestamp;
switch (event.sensor) {
case SDL_SENSOR_ACCEL: {
motion.accel_x = -event.data[0] / gravity_constant;
motion.accel_y = event.data[2] / gravity_constant;
motion.accel_z = -event.data[1] / gravity_constant;
break;
}
case SDL_SENSOR_GYRO: {
motion.gyro_x = event.data[0] / (Common::PI * 2);
motion.gyro_y = -event.data[2] / (Common::PI * 2);
motion.gyro_z = event.data[1] / (Common::PI * 2);
break;
}
}
// Ignore duplicated timestamps
if (time_difference == 0) {
return false;
}
// Motion data is invalid
if (motion.accel_x == 0 && motion.gyro_x == 0 && motion.accel_y == 0 &&
motion.gyro_y == 0 && motion.accel_z == 0 && motion.gyro_z == 0) {
if (motion_error_count++ < 200) {
return false;
}
// Try restarting the sensor
motion_error_count = 0;
EnableMotion();
return false;
}
motion_error_count = 0;
motion.delta_timestamp = time_difference;
return true;
}
const BasicMotion& GetMotion() const {
return motion;
}
bool RumblePlay(const Common::Input::VibrationStatus vibration) {
constexpr u32 rumble_max_duration_ms = 2000;
constexpr f32 low_start_sensitivity_limit = 140.0f;
constexpr f32 low_width_sensitivity_limit = 400.0f;
constexpr f32 high_start_sensitivity_limit = 200.0f;
constexpr f32 high_width_sensitivity_limit = 700.0f;
// Try to provide some feeling of the frequency by reducing the amplitude depending on it.
f32 low_frequency_scale = 1.0f;
if (vibration.low_frequency > low_start_sensitivity_limit) {
low_frequency_scale =
(std::max)(1.0f - (vibration.low_frequency - low_start_sensitivity_limit) /
low_width_sensitivity_limit,
0.3f);
}
f32 low_amplitude = vibration.low_amplitude * low_frequency_scale;
f32 high_frequency_scale = 1.0f;
if (vibration.high_frequency > high_start_sensitivity_limit) {
high_frequency_scale =
(std::max)(1.0f - (vibration.high_frequency - high_start_sensitivity_limit) /
high_width_sensitivity_limit,
0.3f);
}
f32 high_amplitude = vibration.high_amplitude * high_frequency_scale;
if (sdl_controller) {
return SDL_RumbleGamepad(sdl_controller.get(), static_cast<u16>(low_amplitude),
static_cast<u16>(high_amplitude), rumble_max_duration_ms);
} else if (sdl_joystick) {
return SDL_RumbleJoystick(sdl_joystick.get(), static_cast<u16>(low_amplitude),
static_cast<u16>(high_amplitude),
rumble_max_duration_ms);
}
return false;
}
bool HasHDRumble() const {
constexpr Uint16 valve_vendor_id = 0x28DE;
const auto is_known_hd_type = [](SDL_GamepadType type) {
return type == SDL_GAMEPAD_TYPE_NINTENDO_SWITCH_PRO ||
type == SDL_GAMEPAD_TYPE_NINTENDO_SWITCH_JOYCON_LEFT ||
type == SDL_GAMEPAD_TYPE_NINTENDO_SWITCH_JOYCON_RIGHT ||
type == SDL_GAMEPAD_TYPE_PS5;
};
// Valve hardware doesn't have any enums in SDL, so we have to support it manually.
// Since they have HD rumble, we can assume that all their hardware supports it, even if we can't detect the exact type.
if (sdl_controller) {
if (is_known_hd_type(SDL_GetGamepadType(sdl_controller.get())) ||
SDL_GetGamepadVendor(sdl_controller.get()) == valve_vendor_id) {
return true;
}
}
if (sdl_joystick) {
if (SDL_GetJoystickVendor(sdl_joystick.get()) == valve_vendor_id) {
return true;
}
}
return false;
}
void EnableVibration(bool is_enabled) {
has_vibration = is_enabled;
is_vibration_tested = true;
}
bool HasVibration() const {
return has_vibration;
}
bool IsVibrationTested() const {
return is_vibration_tested;
}
/**
* The Pad identifier of the joystick
*/
const PadIdentifier GetPadIdentifier() const {
return {
.guid = guid,
.port = static_cast<std::size_t>(port),
.pad = 0,
};
}
/**
* The guid of the joystick
*/
const Common::UUID& GetGUID() const {
return guid;
}
/**
* The number of joystick from the same type that were connected before this joystick
*/
int GetPort() const {
return port;
}
SDL_Joystick* GetSDLJoystick() const {
return sdl_joystick.get();
}
SDL_Gamepad* GetSDLGameController() const {
return sdl_controller.get();
}
void SetSDLJoystick(SDL_Joystick* joystick, SDL_Gamepad* controller) {
sdl_joystick.reset(joystick);
sdl_controller.reset(controller);
}
bool IsJoyconLeft() const {
const std::string controller_name = GetControllerName();
if (std::strstr(controller_name.c_str(), "Joy-Con Left") != nullptr) {
return true;
}
if (std::strstr(controller_name.c_str(), "Joy-Con (L)") != nullptr) {
return true;
}
return false;
}
bool IsJoyconRight() const {
const std::string controller_name = GetControllerName();
if (std::strstr(controller_name.c_str(), "Joy-Con Right") != nullptr) {
return true;
}
if (std::strstr(controller_name.c_str(), "Joy-Con (R)") != nullptr) {
return true;
}
return false;
}
Common::Input::BatteryLevel GetBatteryLevel(SDL_PowerState battery_level, int percent) {
if (battery_level == SDL_POWERSTATE_CHARGING) {
return Common::Input::BatteryLevel::Charging;
}
if (percent >= 0 && percent <= 100) {
if (percent <= 5) {
return Common::Input::BatteryLevel::Empty;
}
if (percent <= 20) {
return Common::Input::BatteryLevel::Critical;
}
if (percent <= 40) {
return Common::Input::BatteryLevel::Low;
}
if (percent <= 70) {
return Common::Input::BatteryLevel::Medium;
}
return Common::Input::BatteryLevel::Full;
}
switch (battery_level) {
case SDL_POWERSTATE_ON_BATTERY:
return Common::Input::BatteryLevel::Medium;
case SDL_POWERSTATE_NO_BATTERY:
return Common::Input::BatteryLevel::None;
case SDL_POWERSTATE_CHARGED:
return Common::Input::BatteryLevel::Full;
case SDL_POWERSTATE_ERROR:
case SDL_POWERSTATE_UNKNOWN:
default:
return Common::Input::BatteryLevel::None;
}
}
std::string GetControllerName() const {
if (sdl_controller) {
switch (SDL_GetGamepadType(sdl_controller.get())) {
case SDL_GAMEPAD_TYPE_XBOX360:
return "Xbox 360 Controller";
case SDL_GAMEPAD_TYPE_XBOXONE:
return "Xbox One Controller";
case SDL_GAMEPAD_TYPE_PS3:
return "DualShock 3 Controller";
case SDL_GAMEPAD_TYPE_PS4:
return "DualShock 4 Controller";
case SDL_GAMEPAD_TYPE_PS5:
return "DualSense Controller";
default:
break;
}
const auto name = SDL_GetGamepadName(sdl_controller.get());
if (name) {
return name;
}
}
if (sdl_joystick) {
const auto name = SDL_GetJoystickName(sdl_joystick.get());
if (name) {
return name;
}
}
return "Unknown";
}
private:
Common::UUID guid;
int port;
std::unique_ptr<SDL_Joystick, decltype(&SDL_CloseJoystick)> sdl_joystick;
std::unique_ptr<SDL_Gamepad, decltype(&SDL_CloseGamepad)> sdl_controller;
mutable std::mutex mutex;
u64 last_motion_update{};
std::size_t motion_error_count{};
bool has_gyro{false};
bool has_accel{false};
bool has_vibration{false};
bool is_vibration_tested{false};
BasicMotion motion;
};
std::shared_ptr<SDLJoystick> SDLDriver::GetSDLJoystickByGUID(const Common::UUID& guid, int port) {
std::scoped_lock lock{joystick_map_mutex};
const auto it = joystick_map.find(guid);
if (it != joystick_map.end()) {
while (it->second.size() <= static_cast<std::size_t>(port)) {
auto joystick = std::make_shared<SDLJoystick>(guid, static_cast<int>(it->second.size()),
nullptr, nullptr);
it->second.emplace_back(std::move(joystick));
}
return it->second[static_cast<std::size_t>(port)];
}
auto joystick = std::make_shared<SDLJoystick>(guid, 0, nullptr, nullptr);
return joystick_map[guid].emplace_back(std::move(joystick));
}
std::shared_ptr<SDLJoystick> SDLDriver::GetSDLJoystickByGUID(const std::string& guid, int port) {
return GetSDLJoystickByGUID(Common::UUID{guid}, port);
}
std::shared_ptr<SDLJoystick> SDLDriver::GetSDLJoystickBySDLID(SDL_JoystickID sdl_id) {
auto sdl_joystick = SDL_GetJoystickFromID(sdl_id);
if (sdl_joystick == nullptr) {
return nullptr;
}
const auto guid = GetGUID(sdl_joystick);
std::scoped_lock lock{joystick_map_mutex};
const auto map_it = joystick_map.find(guid);
if (map_it == joystick_map.end()) {
return nullptr;
}
const auto vec_it = std::find_if(map_it->second.begin(), map_it->second.end(),
[&sdl_joystick](const auto& joystick) {
return joystick->GetSDLJoystick() == sdl_joystick;
});
if (vec_it == map_it->second.end()) {
return nullptr;
}
return *vec_it;
}
std::shared_ptr<SDLJoystick> SDLDriver::GetSDLJoystickByGamepadID(SDL_JoystickID sdl_id) {
auto* const sdl_gamepad = SDL_GetGamepadFromID(sdl_id);
if (sdl_gamepad == nullptr) {
return nullptr;
}
auto* const sdl_joystick = SDL_GetGamepadJoystick(sdl_gamepad);
if (sdl_joystick == nullptr) {
return nullptr;
}
const auto guid = GetGUID(sdl_joystick);
std::scoped_lock lock{joystick_map_mutex};
const auto map_it = joystick_map.find(guid);
if (map_it == joystick_map.end()) {
return nullptr;
}
const auto vec_it = std::find_if(map_it->second.begin(), map_it->second.end(),
[sdl_joystick, sdl_gamepad](const auto& joystick) {
return joystick->GetSDLJoystick() == sdl_joystick ||
joystick->GetSDLGameController() == sdl_gamepad;
});
if (vec_it == map_it->second.end()) {
return nullptr;
}
return *vec_it;
}
void SDLDriver::InitJoystick(SDL_JoystickID joystick_id) {
SDL_Joystick* sdl_joystick = SDL_OpenJoystick(joystick_id);
SDL_Gamepad* sdl_gamecontroller = nullptr;
int battery_percent = -1;
SDL_PowerState battery_state = SDL_POWERSTATE_UNKNOWN;
if (SDL_IsGamepad(joystick_id)) {
sdl_gamecontroller = SDL_OpenGamepad(joystick_id);
}
if (!sdl_joystick) {
LOG_ERROR(Input, "Failed to open joystick {}", joystick_id);
return;
}
battery_state = SDL_GetJoystickPowerInfo(sdl_joystick, &battery_percent);
const auto guid = GetGUID(sdl_joystick);
if (Settings::values.enable_joycon_driver) {
if (guid.uuid[5] == 0x05 && guid.uuid[4] == 0x7e &&
(guid.uuid[8] == 0x06 || guid.uuid[8] == 0x07)) {
LOG_WARNING(Input, "Preferring joycon driver for device index {}", joystick_id);
SDL_CloseJoystick(sdl_joystick);
return;
}
}
if (Settings::values.enable_procon_driver) {
if (guid.uuid[5] == 0x05 && guid.uuid[4] == 0x7e && guid.uuid[8] == 0x09) {
LOG_WARNING(Input, "Preferring joycon driver for device index {}", joystick_id);
SDL_CloseJoystick(sdl_joystick);
return;
}
}
std::scoped_lock lock{joystick_map_mutex};
if (joystick_map.find(guid) == joystick_map.end()) {
auto joystick = std::make_shared<SDLJoystick>(guid, 0, sdl_joystick, sdl_gamecontroller);
PreSetController(joystick->GetPadIdentifier());
joystick->EnableMotion();
SetBattery(joystick->GetPadIdentifier(),
joystick->GetBatteryLevel(battery_state, battery_percent));
joystick_map[guid].emplace_back(std::move(joystick));
return;
}
auto& joystick_guid_list = joystick_map[guid];
const auto joystick_it =
std::find_if(joystick_guid_list.begin(), joystick_guid_list.end(),
[](const auto& joystick) { return !joystick->GetSDLJoystick(); });
if (joystick_it != joystick_guid_list.end()) {
(*joystick_it)->SetSDLJoystick(sdl_joystick, sdl_gamecontroller);
(*joystick_it)->EnableMotion();
SetBattery((*joystick_it)->GetPadIdentifier(),
(*joystick_it)->GetBatteryLevel(battery_state, battery_percent));
return;
}
const int port = static_cast<int>(joystick_guid_list.size());
auto joystick = std::make_shared<SDLJoystick>(guid, port, sdl_joystick, sdl_gamecontroller);
PreSetController(joystick->GetPadIdentifier());
joystick->EnableMotion();
SetBattery(joystick->GetPadIdentifier(),
joystick->GetBatteryLevel(battery_state, battery_percent));
joystick_guid_list.emplace_back(std::move(joystick));
}
void SDLDriver::CloseJoystick(SDL_Joystick* sdl_joystick) {
const auto guid = GetGUID(sdl_joystick);
std::scoped_lock lock{joystick_map_mutex};
// This call to guid is safe since the joystick is guaranteed to be in the map
const auto& joystick_guid_list = joystick_map[guid];
const auto joystick_it = std::find_if(joystick_guid_list.begin(), joystick_guid_list.end(),
[&sdl_joystick](const auto& joystick) {
return joystick->GetSDLJoystick() == sdl_joystick;
});
if (joystick_it != joystick_guid_list.end()) {
(*joystick_it)->SetSDLJoystick(nullptr, nullptr);
}
}
void SDLDriver::PumpEvents() const {
if (initialized) {
SDL_PumpEvents();
}
}
void SDLDriver::HandleGameControllerEvent(const SDL_Event& event) {
switch (event.type) {
case SDL_EVENT_JOYSTICK_BUTTON_UP: {
if (const auto joystick = GetSDLJoystickBySDLID(event.jbutton.which)) {
const PadIdentifier identifier = joystick->GetPadIdentifier();
SetButton(identifier, event.jbutton.button, false);
}
break;
}
case SDL_EVENT_JOYSTICK_BUTTON_DOWN: {
if (const auto joystick = GetSDLJoystickBySDLID(event.jbutton.which)) {
const PadIdentifier identifier = joystick->GetPadIdentifier();
SetButton(identifier, event.jbutton.button, true);
}
break;
}
case SDL_EVENT_JOYSTICK_HAT_MOTION: {
if (const auto joystick = GetSDLJoystickBySDLID(event.jhat.which)) {
const PadIdentifier identifier = joystick->GetPadIdentifier();
SetHatButton(identifier, event.jhat.hat, event.jhat.value);
}
break;
}
case SDL_EVENT_JOYSTICK_AXIS_MOTION: {
if (const auto joystick = GetSDLJoystickBySDLID(event.jaxis.which)) {
const PadIdentifier identifier = joystick->GetPadIdentifier();
SetAxis(identifier, event.jaxis.axis, event.jaxis.value / 32767.0f);
}
break;
}
case SDL_EVENT_GAMEPAD_SENSOR_UPDATE: {
auto joystick = GetSDLJoystickByGamepadID(event.gsensor.which);
if (!joystick) {
joystick = GetSDLJoystickBySDLID(event.gsensor.which);
}
if (joystick) {
if (joystick->UpdateMotion(event.gsensor)) {
const PadIdentifier identifier = joystick->GetPadIdentifier();
SetMotion(identifier, 0, joystick->GetMotion());
}
}
break;
}
case SDL_EVENT_JOYSTICK_BATTERY_UPDATED: {
if (auto joystick = GetSDLJoystickBySDLID(event.jbattery.which)) {
const PadIdentifier identifier = joystick->GetPadIdentifier();
SetBattery(identifier,
joystick->GetBatteryLevel(event.jbattery.state, event.jbattery.percent));
}
break;
}
case SDL_EVENT_JOYSTICK_REMOVED:
LOG_DEBUG(Input, "Controller removed with Instance_ID {}", event.jdevice.which);
CloseJoystick(SDL_GetJoystickFromID(event.jdevice.which));
break;
case SDL_EVENT_JOYSTICK_ADDED:
LOG_DEBUG(Input, "Controller connected with device index {}", event.jdevice.which);
InitJoystick(event.jdevice.which);
break;
}
}
void SDLDriver::CloseJoysticks() {
std::scoped_lock lock{joystick_map_mutex};
joystick_map.clear();
}
SDLDriver::SDLDriver(std::string input_engine_) : InputEngine(std::move(input_engine_)) {
// Set our application name. Currently passed to DBus by SDL and visible to the user through
// their desktop environment.
SDL_SetHint(SDL_HINT_APP_NAME, "Eden");
// Disable raw input. When enabled this setting causes SDL to die when a web applet opens
SDL_SetHint(SDL_HINT_JOYSTICK_RAWINPUT, Settings::values.enable_raw_input ? "1" : "0");
// SDL3 defaults Steam Controller Bluetooth HIDAPI support to off, which can disable gyro.
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_STEAM, "1");
SDL_SetHint(SDL_HINT_GAMECONTROLLER_SENSOR_FUSION, "1");
SDL_SetHint(SDL_HINT_AUTO_UPDATE_SENSORS, "1");
// Enable HIDAPI rumble. This prevents SDL from disabling motion on PS4 and PS5 controllers
SDL_SetHint(SDL_HINT_JOYSTICK_ENHANCED_REPORTS, "1");
SDL_SetHint(SDL_HINT_JOYSTICK_ALLOW_BACKGROUND_EVENTS, "1");
// Disable hidapi drivers for joycon controllers when the custom joycon driver is enabled
if (Settings::values.enable_joycon_driver) {
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_JOY_CONS, "0");
} else {
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_JOY_CONS, "1");
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_JOYCON_HOME_LED, "0");
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_COMBINE_JOY_CONS, "0");
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_VERTICAL_JOY_CONS, "1");
}
// Disable hidapi drivers for pro controllers when the custom joycon driver is enabled
if (Settings::values.enable_procon_driver) {
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_SWITCH, "0");
} else {
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_SWITCH, "1");
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_SWITCH_HOME_LED, "0");
}
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_SWITCH_PLAYER_LED, "1");
// Disable hidapi driver for xbox. Already default on Windows, this causes conflict with native
// driver on Linux.
SDL_SetHint(SDL_HINT_JOYSTICK_HIDAPI_XBOX, "0");
// If the frontend is going to manage the event loop, then we don't start one here
start_thread = SDL_WasInit(SDL_INIT_JOYSTICK | SDL_INIT_GAMEPAD) == 0;
if (start_thread && !SDL_Init(SDL_INIT_JOYSTICK | SDL_INIT_GAMEPAD)) {
LOG_CRITICAL(Input, "SDL_Init failed with: {}", SDL_GetError());
return;
}
SDL_AddEventWatch(&SDLEventWatcher, this);
initialized = true;
if (start_thread) {
vibration_thread = std::thread([this] {
Common::SetCurrentThreadName("SDL_Vibration");
using namespace std::chrono_literals;
while (initialized) {
SendVibrations();
std::this_thread::sleep_for(250ms); // 4 TPS
}
});
}
// Because the events for joystick connection happens before we have our event watcher added, we
// can just open all the joysticks right here
int joystick_count = 0;
SDL_JoystickID* joysticks = SDL_GetJoysticks(&joystick_count);
if (joysticks != nullptr) {
for (int i = 0; i < joystick_count; ++i) {
InitJoystick(joysticks[i]);
}
SDL_free(joysticks);
}
}
SDLDriver::~SDLDriver() {
CloseJoysticks();
SDL_RemoveEventWatch(&SDLEventWatcher, this);
initialized = false;
if (start_thread) {
vibration_thread.join();
SDL_QuitSubSystem(SDL_INIT_JOYSTICK | SDL_INIT_GAMEPAD);
}
}
std::vector<Common::ParamPackage> SDLDriver::GetInputDevices() const {
std::vector<Common::ParamPackage> devices;
ankerl::unordered_dense::map<int, std::shared_ptr<SDLJoystick>> joycon_pairs;
for (const auto& [key, value] : joystick_map) {
for (const auto& joystick : value) {
if (!joystick->GetSDLJoystick()) {
continue;
}
const std::string name =
fmt::format("{} {}", joystick->GetControllerName(), joystick->GetPort());
devices.emplace_back(Common::ParamPackage{
{"engine", GetEngineName()},
{"display", std::move(name)},
{"guid", joystick->GetGUID().RawString()},
{"port", std::to_string(joystick->GetPort())},
});
if (joystick->IsJoyconLeft()) {
joycon_pairs.insert_or_assign(joystick->GetPort(), joystick);
}
}
}
// Add dual controllers
for (const auto& [key, value] : joystick_map) {
for (const auto& joystick : value) {
if (joystick->IsJoyconRight()) {
if (!joycon_pairs.contains(joystick->GetPort())) {
continue;
}
const auto joystick2 = joycon_pairs.at(joystick->GetPort());
const std::string name =
fmt::format("{} {}", "Nintendo Dual Joy-Con", joystick->GetPort());
devices.emplace_back(Common::ParamPackage{
{"engine", GetEngineName()},
{"display", std::move(name)},
{"guid", joystick->GetGUID().RawString()},
{"guid2", joystick2->GetGUID().RawString()},
{"port", std::to_string(joystick->GetPort())},
});
}
}
}
return devices;
}
Common::Input::DriverResult SDLDriver::SetVibration(
const PadIdentifier& identifier, const Common::Input::VibrationStatus& vibration) {
const auto joystick =
GetSDLJoystickByGUID(identifier.guid.RawString(), static_cast<int>(identifier.port));
const auto process_amplitude_exp = [](f32 amplitude, f32 factor) {
return (amplitude + std::pow(amplitude, factor)) * 0.5f * 0xFFFF;
};
// Default exponential curve for rumble
f32 factor = 0.35f;
// If vibration is set as a linear output use a flatter value
if (vibration.type == Common::Input::VibrationAmplificationType::Linear) {
factor = 0.5f;
}
// Amplitude for HD rumble needs no modification
if (joystick->HasHDRumble()) {
factor = 1.0f;
}
const Common::Input::VibrationStatus new_vibration{
.low_amplitude = process_amplitude_exp(vibration.low_amplitude, factor),
.low_frequency = vibration.low_frequency,
.high_amplitude = process_amplitude_exp(vibration.high_amplitude, factor),
.high_frequency = vibration.high_frequency,
.type = Common::Input::VibrationAmplificationType::Exponential,
};
vibration_queue.Push(VibrationRequest{
.identifier = identifier,
.vibration = new_vibration,
});
return Common::Input::DriverResult::Success;
}
bool SDLDriver::IsVibrationEnabled(const PadIdentifier& identifier) {
const auto joystick =
GetSDLJoystickByGUID(identifier.guid.RawString(), static_cast<int>(identifier.port));
static constexpr Common::Input::VibrationStatus test_vibration{
.low_amplitude = 1,
.low_frequency = 160.0f,
.high_amplitude = 1,
.high_frequency = 320.0f,
.type = Common::Input::VibrationAmplificationType::Exponential,
};
static constexpr Common::Input::VibrationStatus zero_vibration{
.low_amplitude = 0,
.low_frequency = 160.0f,
.high_amplitude = 0,
.high_frequency = 320.0f,
.type = Common::Input::VibrationAmplificationType::Exponential,
};
if (joystick->IsVibrationTested()) {
return joystick->HasVibration();
}
// First vibration might fail
joystick->RumblePlay(test_vibration);
// Wait for about 15ms to ensure the controller is ready for the stop command
std::this_thread::sleep_for(std::chrono::milliseconds(15));
if (!joystick->RumblePlay(zero_vibration)) {
joystick->EnableVibration(false);
return false;
}
joystick->EnableVibration(true);
return true;
}
void SDLDriver::SendVibrations() {
std::vector<VibrationRequest> filtered_vibrations{};
while (!vibration_queue.Empty()) {
VibrationRequest request;
vibration_queue.Pop(request);
const auto joystick = GetSDLJoystickByGUID(request.identifier.guid.RawString(),
static_cast<int>(request.identifier.port));
const auto it = std::find_if(filtered_vibrations.begin(), filtered_vibrations.end(),
[request](VibrationRequest vibration) {
return vibration.identifier == request.identifier;
});
if (it == filtered_vibrations.end()) {
filtered_vibrations.push_back(std::move(request));
continue;
}
*it = request;
}
for (const auto& vibration : filtered_vibrations) {
const auto joystick = GetSDLJoystickByGUID(vibration.identifier.guid.RawString(),
static_cast<int>(vibration.identifier.port));
joystick->RumblePlay(vibration.vibration);
}
}
Common::ParamPackage SDLDriver::BuildAnalogParamPackageForButton(int port, const Common::UUID& guid,
s32 axis, float value) const {
Common::ParamPackage params{};
params.Set("engine", GetEngineName());
params.Set("port", port);
params.Set("guid", guid.RawString());
params.Set("axis", axis);
params.Set("threshold", "0.5");
params.Set("invert", value < 0 ? "-" : "+");
return params;
}
Common::ParamPackage SDLDriver::BuildButtonParamPackageForButton(int port, const Common::UUID& guid,
s32 button) const {
Common::ParamPackage params{};
params.Set("engine", GetEngineName());
params.Set("port", port);
params.Set("guid", guid.RawString());
params.Set("button", button);
return params;
}
Common::ParamPackage SDLDriver::BuildHatParamPackageForButton(int port, const Common::UUID& guid,
s32 hat, u8 value) const {
Common::ParamPackage params{};
params.Set("engine", GetEngineName());
params.Set("port", port);
params.Set("guid", guid.RawString());
params.Set("hat", hat);
params.Set("direction", GetHatButtonName(value));
return params;
}
Common::ParamPackage SDLDriver::BuildMotionParam(int port, const Common::UUID& guid) const {
Common::ParamPackage params{};
params.Set("engine", GetEngineName());
params.Set("motion", 0);
params.Set("port", port);
params.Set("guid", guid.RawString());
return params;
}
Common::ParamPackage SDLDriver::BuildParamPackageForBinding(
int port, const Common::UUID& guid, const SDL_GamepadBinding& binding) const {
switch (binding.input_type) {
case SDL_GAMEPAD_BINDTYPE_NONE:
break;
case SDL_GAMEPAD_BINDTYPE_AXIS:
return BuildAnalogParamPackageForButton(port, guid, binding.input.axis.axis);
case SDL_GAMEPAD_BINDTYPE_BUTTON:
return BuildButtonParamPackageForButton(port, guid, binding.input.button);
case SDL_GAMEPAD_BINDTYPE_HAT:
return BuildHatParamPackageForButton(port, guid, binding.input.hat.hat,
static_cast<u8>(binding.input.hat.hat_mask));
}
return {};
}
Common::ParamPackage SDLDriver::BuildParamPackageForAnalog(PadIdentifier identifier, int axis_x,
int axis_y, float offset_x,
float offset_y) const {
Common::ParamPackage params;
params.Set("engine", GetEngineName());
params.Set("port", static_cast<int>(identifier.port));
params.Set("guid", identifier.guid.RawString());
params.Set("axis_x", axis_x);
params.Set("axis_y", axis_y);
params.Set("offset_x", offset_x);
params.Set("offset_y", offset_y);
params.Set("invert_x", "+");
params.Set("invert_y", "+");
return params;
}
ButtonMapping SDLDriver::GetButtonMappingForDevice(const Common::ParamPackage& params) {
if (!params.Has("guid") || !params.Has("port")) {
return {};
}
const auto joystick = GetSDLJoystickByGUID(params.Get("guid", ""), params.Get("port", 0));
auto* controller = joystick->GetSDLGameController();
if (controller == nullptr) {
return {};
}
// This list is missing ZL/ZR since those are not considered buttons in SDL GameController.
// We will add those afterwards
ButtonBindings switch_to_sdl_button;
switch_to_sdl_button = GetDefaultButtonBinding(joystick);
// Add the missing bindings for ZL/ZR
static constexpr ZButtonBindings switch_to_sdl_axis{{
{Settings::NativeButton::ZL, SDL_GAMEPAD_AXIS_LEFT_TRIGGER},
{Settings::NativeButton::ZR, SDL_GAMEPAD_AXIS_RIGHT_TRIGGER},
}};
// Parameters contain two joysticks return dual
if (params.Has("guid2")) {
const auto joystick2 = GetSDLJoystickByGUID(params.Get("guid2", ""), params.Get("port", 0));
if (joystick2->GetSDLGameController() != nullptr) {
return GetDualControllerMapping(joystick, joystick2, switch_to_sdl_button,
switch_to_sdl_axis);
}
}
return GetSingleControllerMapping(joystick, switch_to_sdl_button, switch_to_sdl_axis);
}
ButtonBindings SDLDriver::GetDefaultButtonBinding(
const std::shared_ptr<SDLJoystick>& joystick) const {
// Default SL/SR mapping for other controllers
auto sll_button = SDL_GAMEPAD_BUTTON_LEFT_SHOULDER;
auto srl_button = SDL_GAMEPAD_BUTTON_RIGHT_SHOULDER;
auto slr_button = SDL_GAMEPAD_BUTTON_LEFT_SHOULDER;
auto srr_button = SDL_GAMEPAD_BUTTON_RIGHT_SHOULDER;
if (joystick->IsJoyconLeft()) {
sll_button = SDL_GAMEPAD_BUTTON_LEFT_PADDLE1;
srl_button = SDL_GAMEPAD_BUTTON_LEFT_PADDLE2;
}
if (joystick->IsJoyconRight()) {
slr_button = SDL_GAMEPAD_BUTTON_RIGHT_PADDLE2;
srr_button = SDL_GAMEPAD_BUTTON_RIGHT_PADDLE1;
}
return {
std::pair{Settings::NativeButton::A, SDL_GAMEPAD_BUTTON_EAST},
{Settings::NativeButton::B, SDL_GAMEPAD_BUTTON_SOUTH},
{Settings::NativeButton::X, SDL_GAMEPAD_BUTTON_NORTH},
{Settings::NativeButton::Y, SDL_GAMEPAD_BUTTON_WEST},
{Settings::NativeButton::LStick, SDL_GAMEPAD_BUTTON_LEFT_STICK},
{Settings::NativeButton::RStick, SDL_GAMEPAD_BUTTON_RIGHT_STICK},
{Settings::NativeButton::L, SDL_GAMEPAD_BUTTON_LEFT_SHOULDER},
{Settings::NativeButton::R, SDL_GAMEPAD_BUTTON_RIGHT_SHOULDER},
{Settings::NativeButton::Plus, SDL_GAMEPAD_BUTTON_START},
{Settings::NativeButton::Minus, SDL_GAMEPAD_BUTTON_BACK},
{Settings::NativeButton::DLeft, SDL_GAMEPAD_BUTTON_DPAD_LEFT},
{Settings::NativeButton::DUp, SDL_GAMEPAD_BUTTON_DPAD_UP},
{Settings::NativeButton::DRight, SDL_GAMEPAD_BUTTON_DPAD_RIGHT},
{Settings::NativeButton::DDown, SDL_GAMEPAD_BUTTON_DPAD_DOWN},
{Settings::NativeButton::SLLeft, sll_button},
{Settings::NativeButton::SRLeft, srl_button},
{Settings::NativeButton::SLRight, slr_button},
{Settings::NativeButton::SRRight, srr_button},
{Settings::NativeButton::Home, SDL_GAMEPAD_BUTTON_GUIDE},
{Settings::NativeButton::Screenshot, SDL_GAMEPAD_BUTTON_MISC1},
};
}
ButtonMapping SDLDriver::GetSingleControllerMapping(
const std::shared_ptr<SDLJoystick>& joystick, const ButtonBindings& switch_to_sdl_button,
const ZButtonBindings& switch_to_sdl_axis) const {
ButtonMapping mapping;
mapping.reserve(switch_to_sdl_button.size() + switch_to_sdl_axis.size());
auto* controller = joystick->GetSDLGameController();
const auto bindings = GetBindings(controller);
for (const auto& [switch_button, sdl_button] : switch_to_sdl_button) {
const auto binding = GetBindingForButton(bindings, sdl_button);
mapping.insert_or_assign(
switch_button,
BuildParamPackageForBinding(joystick->GetPort(), joystick->GetGUID(), binding));
}
for (const auto& [switch_button, sdl_axis] : switch_to_sdl_axis) {
const auto binding = GetBindingForAxis(bindings, sdl_axis);
mapping.insert_or_assign(
switch_button,
BuildParamPackageForBinding(joystick->GetPort(), joystick->GetGUID(), binding));
}
return mapping;
}
ButtonMapping SDLDriver::GetDualControllerMapping(const std::shared_ptr<SDLJoystick>& joystick,
const std::shared_ptr<SDLJoystick>& joystick2,
const ButtonBindings& switch_to_sdl_button,
const ZButtonBindings& switch_to_sdl_axis) const {
ButtonMapping mapping;
mapping.reserve(switch_to_sdl_button.size() + switch_to_sdl_axis.size());
auto* controller = joystick->GetSDLGameController();
auto* controller2 = joystick2->GetSDLGameController();
const auto bindings = GetBindings(controller);
const auto bindings2 = GetBindings(controller2);
for (const auto& [switch_button, sdl_button] : switch_to_sdl_button) {
if (IsButtonOnLeftSide(switch_button)) {
const auto binding = GetBindingForButton(bindings2, sdl_button);
mapping.insert_or_assign(
switch_button,
BuildParamPackageForBinding(joystick2->GetPort(), joystick2->GetGUID(), binding));
continue;
}
const auto binding = GetBindingForButton(bindings, sdl_button);
mapping.insert_or_assign(
switch_button,
BuildParamPackageForBinding(joystick->GetPort(), joystick->GetGUID(), binding));
}
for (const auto& [switch_button, sdl_axis] : switch_to_sdl_axis) {
if (IsButtonOnLeftSide(switch_button)) {
const auto binding = GetBindingForAxis(bindings2, sdl_axis);
mapping.insert_or_assign(
switch_button,
BuildParamPackageForBinding(joystick2->GetPort(), joystick2->GetGUID(), binding));
continue;
}
const auto binding = GetBindingForAxis(bindings, sdl_axis);
mapping.insert_or_assign(
switch_button,
BuildParamPackageForBinding(joystick->GetPort(), joystick->GetGUID(), binding));
}
return mapping;
}
bool SDLDriver::IsButtonOnLeftSide(Settings::NativeButton::Values button) const {
switch (button) {
case Settings::NativeButton::DDown:
case Settings::NativeButton::DLeft:
case Settings::NativeButton::DRight:
case Settings::NativeButton::DUp:
case Settings::NativeButton::L:
case Settings::NativeButton::LStick:
case Settings::NativeButton::Minus:
case Settings::NativeButton::Screenshot:
case Settings::NativeButton::ZL:
return true;
default:
return false;
}
}
AnalogMapping SDLDriver::GetAnalogMappingForDevice(const Common::ParamPackage& params) {
if (!params.Has("guid") || !params.Has("port")) {
return {};
}
const auto joystick = GetSDLJoystickByGUID(params.Get("guid", ""), params.Get("port", 0));
const auto joystick2 = GetSDLJoystickByGUID(params.Get("guid2", ""), params.Get("port", 0));
auto* controller = joystick->GetSDLGameController();
if (controller == nullptr) {
return {};
}
AnalogMapping mapping = {};
const auto bindings = GetBindings(controller);
const auto binding_left_x = GetBindingForAxis(bindings, SDL_GAMEPAD_AXIS_LEFTX);
const auto binding_left_y = GetBindingForAxis(bindings, SDL_GAMEPAD_AXIS_LEFTY);
if (params.Has("guid2")) {
const auto identifier = joystick2->GetPadIdentifier();
PreSetController(identifier);
PreSetAxis(identifier, binding_left_x.input.axis.axis);
PreSetAxis(identifier, binding_left_y.input.axis.axis);
const auto left_offset_x = -GetAxis(identifier, binding_left_x.input.axis.axis);
const auto left_offset_y = GetAxis(identifier, binding_left_y.input.axis.axis);
mapping.insert_or_assign(Settings::NativeAnalog::LStick,
BuildParamPackageForAnalog(identifier, binding_left_x.input.axis.axis,
binding_left_y.input.axis.axis,
left_offset_x, left_offset_y));
} else {
const auto identifier = joystick->GetPadIdentifier();
PreSetController(identifier);
PreSetAxis(identifier, binding_left_x.input.axis.axis);
PreSetAxis(identifier, binding_left_y.input.axis.axis);
const auto left_offset_x = -GetAxis(identifier, binding_left_x.input.axis.axis);
const auto left_offset_y = GetAxis(identifier, binding_left_y.input.axis.axis);
mapping.insert_or_assign(Settings::NativeAnalog::LStick,
BuildParamPackageForAnalog(identifier, binding_left_x.input.axis.axis,
binding_left_y.input.axis.axis,
left_offset_x, left_offset_y));
}
const auto binding_right_x = GetBindingForAxis(bindings, SDL_GAMEPAD_AXIS_RIGHTX);
const auto binding_right_y = GetBindingForAxis(bindings, SDL_GAMEPAD_AXIS_RIGHTY);
const auto identifier = joystick->GetPadIdentifier();
PreSetController(identifier);
PreSetAxis(identifier, binding_right_x.input.axis.axis);
PreSetAxis(identifier, binding_right_y.input.axis.axis);
const auto right_offset_x = -GetAxis(identifier, binding_right_x.input.axis.axis);
const auto right_offset_y = GetAxis(identifier, binding_right_y.input.axis.axis);
mapping.insert_or_assign(Settings::NativeAnalog::RStick,
BuildParamPackageForAnalog(identifier, binding_right_x.input.axis.axis,
binding_right_y.input.axis.axis, right_offset_x,
right_offset_y));
return mapping;
}
MotionMapping SDLDriver::GetMotionMappingForDevice(const Common::ParamPackage& params) {
if (!params.Has("guid") || !params.Has("port")) {
return {};
}
const auto joystick = GetSDLJoystickByGUID(params.Get("guid", ""), params.Get("port", 0));
const auto joystick2 = GetSDLJoystickByGUID(params.Get("guid2", ""), params.Get("port", 0));
auto* controller = joystick->GetSDLGameController();
if (controller == nullptr) {
return {};
}
MotionMapping mapping = {};
joystick->EnableMotion();
if (joystick->HasMotion()) {
mapping.insert_or_assign(Settings::NativeMotion::MotionRight,
BuildMotionParam(joystick->GetPort(), joystick->GetGUID()));
}
if (params.Has("guid2")) {
joystick2->EnableMotion();
if (joystick2->HasMotion()) {
mapping.insert_or_assign(Settings::NativeMotion::MotionLeft,
BuildMotionParam(joystick2->GetPort(), joystick2->GetGUID()));
}
} else {
if (joystick->HasMotion()) {
mapping.insert_or_assign(Settings::NativeMotion::MotionLeft,
BuildMotionParam(joystick->GetPort(), joystick->GetGUID()));
}
}
return mapping;
}
Common::Input::ButtonNames SDLDriver::GetUIName(const Common::ParamPackage& params) const {
if (params.Has("button")) {
// TODO(German77): Find how to substitute the values for real button names
return Common::Input::ButtonNames::Value;
}
if (params.Has("hat")) {
return Common::Input::ButtonNames::Value;
}
if (params.Has("axis")) {
return Common::Input::ButtonNames::Value;
}
if (params.Has("axis_x") && params.Has("axis_y") && params.Has("axis_z")) {
return Common::Input::ButtonNames::Value;
}
if (params.Has("motion")) {
return Common::Input::ButtonNames::Engine;
}
return Common::Input::ButtonNames::Invalid;
}
std::string SDLDriver::GetHatButtonName(u8 direction_value) const {
switch (direction_value) {
case SDL_HAT_UP:
return "up";
case SDL_HAT_DOWN:
return "down";
case SDL_HAT_LEFT:
return "left";
case SDL_HAT_RIGHT:
return "right";
default:
return {};
}
}
u8 SDLDriver::GetHatButtonId(const std::string& direction_name) const {
Uint8 direction;
if (direction_name == "up") {
direction = SDL_HAT_UP;
} else if (direction_name == "down") {
direction = SDL_HAT_DOWN;
} else if (direction_name == "left") {
direction = SDL_HAT_LEFT;
} else if (direction_name == "right") {
direction = SDL_HAT_RIGHT;
} else {
direction = 0;
}
return direction;
}
bool SDLDriver::IsStickInverted(const Common::ParamPackage& params) {
if (!params.Has("guid") || !params.Has("port")) {
return false;
}
const auto joystick = GetSDLJoystickByGUID(params.Get("guid", ""), params.Get("port", 0));
if (joystick == nullptr) {
return false;
}
auto* controller = joystick->GetSDLGameController();
if (controller == nullptr) {
return false;
}
const auto& axis_x = params.Get("axis_x", 0);
const auto& axis_y = params.Get("axis_y", 0);
const auto bindings = GetBindings(controller);
const auto binding_left_x = GetBindingForAxis(bindings, SDL_GAMEPAD_AXIS_LEFTX);
const auto binding_right_x = GetBindingForAxis(bindings, SDL_GAMEPAD_AXIS_RIGHTX);
const auto binding_left_y = GetBindingForAxis(bindings, SDL_GAMEPAD_AXIS_LEFTY);
const auto binding_right_y = GetBindingForAxis(bindings, SDL_GAMEPAD_AXIS_RIGHTY);
if (axis_x != binding_left_y.input.axis.axis && axis_x != binding_right_y.input.axis.axis) {
return false;
}
if (axis_y != binding_left_x.input.axis.axis && axis_y != binding_right_x.input.axis.axis) {
return false;
}
return true;
}
} // namespace InputCommon
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